/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import dao.ItemDAO;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import model.Item;

/**
 *
 * @author Student
 */
public class ControllerServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        String action = request.getParameter("action");
        RequestDispatcher rd = null;
        ItemDAO dao = new ItemDAO();
        HttpSession sesi = request.getSession(true);
        List<Item> items = null;
        if(sesi.getAttribute("items")==null){
            items = dao.getAll();
            sesi.setAttribute("items", items);
        }else{
            items = (ArrayList<Item>)sesi.getAttribute("items");
        }

        if (action.equalsIgnoreCase("listItem")) {
            request.setAttribute("listItem", items);
            rd = request.getRequestDispatcher("item_list.jsp");
        } else if (action.equalsIgnoreCase("save")) {
            int id = Integer.valueOf(request.getParameter("id"));
            String nama = request.getParameter("nama");
            String keterangan = request.getParameter("keterangan");
            double harga = Double.valueOf(request.getParameter("harga"));
            Item item = new Item(id, nama, keterangan, harga);
            dao.insert(item);
            items.add(item);  
            sesi.setAttribute("items", items);
            rd = request.getRequestDispatcher("controller?action=listItem");
        } else if(action.equalsIgnoreCase("newItem")){
            rd = request.getRequestDispatcher("item_form.jsp");
        }
        
        

        rd.forward(request, response);

    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
